Ventilating-cowl.



' B. H. VAN AUKEN.

VENTILATING OOWL.

APPLICATION FILED JULY 6, 1912. RENIEWBD 001'. 21, 1913.

1,097,487. Patented May 19, 1914.

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INVENTOR WITNESSES f B. H. VAN AUKEN.

VENTILATING GOWL.

APPLICATION FILED JULY 6, 1912. RENEWED 001". 21, 1913.

1,097,487. Patented. May 19, 1914.

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B. H. VAN AUKEN.

VENTILATING COWL.

APPLICATION FILED JULY 6, 1912. RENEWED OCT. 21, 1913.

Patented May 19, 1914.

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(315 SYRACUSE, NEW? YORK.

VIENTILATING-GOWL.

To all whom it may concern Be it known that I, BENJAMIN l-l. VAN Arman, a citizen of the United States, residing at Syracuse, in the county of @nondaga and State of New York, have invented certain new and useful Improvements in Ventilating-Cowls; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and. use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in ventilating cowls and the object in view is to generally improve upon and render more etlicient apparatus of this nature.

My invention comprises various details of construction and combinations and arrange ments of parts which will be hereinafter fully described, shown in the accompanying drawings and then specifically defined in the appended claims.

My invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a cowl made in accordance with my invention. Fig. 2 is a vertical central sectional view through the same. 3 is a side elevation of a slightly modified form of the cowl. Fig. 4 is a central vertical sectional view through the modified form, 5 is a central sectional view of another modified form of the cowl, and Fig. 6 is a bottom plan View.

Reference now being had to the details of the drawings by letter, A designates a flue adapted to communicate with the room to be ventilated and having its upper end A outwardly flaring, as shown clearly in Fig. 2 of the drawings. Supported upon the flaring portion of the flue by means of the bars B, which are fastened to said fine, is a. double, conical-shaped shell C having the concaved walls I) and D. Also supported by the bars 13, which are preferably bent in proper form, is a deflecting band or shell E having a concaved circumference E, the inner surface of which is convexed and fastened to a concaved portion B of the bars. Mounted upon the upper angled ends E of said bars is a hood E which is conical shaped and is Specification of Letters Patent.

Patented May 19, 19rd. Renewed october 21, 1913. Serial No. 796,512.

concaved as at F, while its lower end is slightly convened as at F Supported upon the lower ends of the bars is a shell H having a central opening I through which the flue A. passes, said opening being of a larger diameter than the diameter of the flue in order to allow a cur rent of air to pass therethrough and which is adapted to form a suction to draw vitiated air through the flue. Said shell .lfl has its lower portion formed in a compound curve K and its upper portion is inwardly concaved as at L and terminates in a straight, horizontal edge L, positioned a, short dis tance above the lower end of the shell E and spaced apart therefrom.

In Fig. 3 of the drawings, 1 have shown a slight modification of. the construction of the cowl in which the fine A is of similar construction to the one illustrated in Fig. 1, and mounted upon the bars J, which are fastened to the flue, is a double, concavcd deflecting shell N, having the apices thereof truncated, forming registering openings N, one above the other. Said bars J also support a. hood 0 which is of a similar shape to that illustrated in Fig. l. of the drawings 113 1 supported upon the upper ends of the bars J.

The shell MI, which is supported by the bars 31 has a compound deflecting surface which is concaved at and Q with an intermediate convexed portion The upper end of the concaved portion Q, terminates in a ridge Q? and the part above the latter is convened, merging into a concaved part at the extreme upper end of the shell M, as shown clearly in the sectional. view (Fig. 1) of the drawings. Fastened to the bars inter mediate the shells M and U is a deflecting member S, the lower portion of which is converted and said member S has a constricted part and above the latter the member outwardly flares as at S A space intervenes between the upper edge of the member S and the lower edge of the hood O and also a space intervenes between the member S and the upper part of the shell M, sulfioient to allow for a draft of air to assist in forming a satisfactory draft through the flue.

in Fig. 5 of the drawings, the flue T supports the bars J in the manner disclosed by the other figures of the drawings and an inverted, conical-shaped deflecting member T is supported centrally over the flue upon the bars T which latter are fastened to the bars J, and a deflecting shell T is supported upon the bars J and to the lower edge of which the bars T are connected. Said deflecting member T is of a general truncated, conical shape with a circumferential wall convexed at its lower end, as at T while its upper end is concaved as at T the upper end of the member '1 projecting a slight distance above the top of the surroundingshell V and spaced apart therefrom. Said shell V is concaved at V near its lower end and is held to the bar J, and said concaved portion of the shell V merges into a convexed part V and again is concaved as at V and terminates in an outwardly flaring edge at its top. w

The hood XV is supported at the upper end of the bars J and is of the general shape before described and illustrated in Figs. 1 and 9. of the drawings.

The general operation of the ventilator and cowl made in accordance with my invention, whereby a suction is produced in the various forms shown, whereby vitiated air may be withdrawn from a room, and at the same time providing a construction whereby currents of outside air will be prevented from blowing down through. the ventilator, is as follows By the peculiar construction of my invention, a current of air coming in contact with the outer surface of the fine A will be deflected by the concaved upper flaring end of the same against the inner concaved portion of the surrounding wall K, the curvature of which will tend to again deflect the current of air to take the direc tion shown by arrow in Fig. 2 of the draw ings, making exit through the space intermediate the shells H and E and thereby producing a suction through the flue A, causing any vitiatecl air to be drawn out and discharged to the atmosphere. Any vitiated air which may be drawn through the flue and coming in contact with the concaved surface D of the shell G will be deflected laterally into the current of air formed in the manner described. By reason of the comound curve to the wall of the lower portion of the shell K, a current will also be caused to pass up through the space intermediate the top of the shell C and the bottom of the shell E and, as it rises up through the shell E, will be again caught by any current of air which may be passing through the space between the bottom of the shell F and the top of the shell E.

It will be noted upon reference to Fig. l of the drawings that any current of air which might come in contact with the concaved surface of the shell E will be deflected by said concaved surface upwardly and, forming an eddy, a further suction force will be produced to assist in drawing vitiated air from the flue. By reason of the concaved part L about the upper portion of the shell H, any current of air coming in contact therewith will be deflected, exerting still further suction force about the upper edge of the shell H, while any air coming in contact with the top shell F will be accordingly deflected upwardly.

I have found from extensive experimenting that the openings intermediate the various deflecting shells and hoods through the vitiated air is adapted to pass should be substantially three times the capacity of the flue, thereby afl'ording ample suction means to act upon the air which is to be drawn through the flue, even though the current of air may come from any direction against the cowl. It will also be noted upon reference to the sectional view of the drawings that the various deflecting surfaces are so arranged that no direct current coming from any direction is allowed to pass direct to the exit end of the flue and which would tend to cause a back pressure therein.

In the various modifications shown, it will be noted that the same principle obtains, of causing a current of air coming in contact with the cowl to take the general course designated by arrows, the various convexed and concaved surfaces tending, each to play its part, to increase the suction force and, at the same time, so arranged that, even though the current might be strong against the cowl and blowing from any direction, it will be prevented from causing a reverse draft down through the fine. The greater the velocity of the current of air coming against the cowl, the greater will be the suction force exerted to draw the vitiated air from the flue.

While I have shown various constructions of cowls, tending to illustrate how the apparatus may be diflerentiated to produce the same result, it will be understood that the relative positions of the shells and deflecting members may vary under difl'erent conditions, as for instance where the cowl may be utilized upon rapidly moving trains, and the space intervening between certain of the parts may be diminished, if desired, and various other changes made in the detailed arrangement of tie parts without in any way departing from the spirit of the invention.

What I claim to be new is 1. A ventilating cowl comprising a flue with the upper end flaring, a deflecting shell positioned about said flaring end of the flue and spaced apart therefrom, said shell having its inner surface which is adjacent to the flaring end convexed, a concaved deflecting member with its inner end forming an apex and extending into the upper flaring end of the flue, said shell having a portion thereof 7 which extends above said deflecting member slightly contracted and concaved, a hood supported above said deflecting member and extending over the shell and spaced apart therefrom, and a wind deflecting member positioned intermediate the hood and said shell and spaced apart from the latter, as set forth.

2. A ventilating cowl comprising a fine with the upper end flaring, a deflecting shell positioned about said flaring end of the fine and spaced apart therefrom, said shell having its inner surface which is adjacent to the flaring end convexed, a coucaved deflecting member with its inner end forming an apex and extending into the upper flaring end of the flue, said shell having a portion thereof which extends above said deflecting member slightly contracted and concaved, a hood supported above said deflecting member and extending over the shell and spaced apart therefrom, a concaved wind deflecting shield in the space intermediate the shell and hood,

concaved deflecting members extending into said deflecting shield and spaced apart there from, as set forth.

A ventilating cowl comprising a flue with its upper end flaring, a deflecting shell positioned about said flaring end of the flue and spaced apart therefrom, a concaved deflecting member extending into the upper flaring end of the flue, said shell having a portion thereof which extends above said deflecting member slightly contracted, a hood supported above the deflecting member and extending over the shell and spaced apart therefrom, and a wind deflecting member positioned intermediate the hood and said shell and spaced apart from the latter, as set forth.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

BENJAMIN H. VAN AUKEN.

Witnesses:

A. L. HOUGH, FRANKLIN H. HoUeH.

00p! of this patent may be obtained for five cents each, by addressing the Commissioner of 12mm, Wazhington, D. 0." 

